〔Day Digest〕Lithium Rips Through 151,600 yuan/t on August Maintenance, Copper Foil and LFP Post H1 Reversals, UBS Lifts 2027 Copper Deficit to 379kt - Yet SHFE Stocks Add 19.8kt

0. Weekly Arc

Battery-metal sentiment firmed across the complex on August 21 ^[1][2][3][4]. The GFEX lithium carbonate main contract held above 155,000 yuan/ton intraday with the broader sector index up as much as 7% ^[1]. Copper foil and LFP cathode producers reported H1 reversals on tight supply, demand expansion, and product structure upgrades, with Hunan Yuneng's H1 net profit up more than 8x year-on-year ^[3][4]. Yet the bull case met an offset in copper: SHFE weekly stocks added 19,817 tons even as UBS projected the 2026 deficit widening to 379,000 tons in 2027 ^[5][6]. The mechanism is divergent supply paths - battery-metal maintenance tightening lithium while Shanghai copper stocks build.

1. Lithium Complex: Maintenance-Driven Rally

• **[NEW] GFEX main contract:** intraday gain of nearly 2%, holding above 155,000 yuan/ton ^[1]. Since the August 1 low of 134,300 yuan/ton, the contract touched 157,500 yuan/ton on August 17 - a move of more than 17% in roughly half a month ^[1].
• **[NEW] Equities leg:** Rongjie Co. hit the daily limit-up; Shengxin Lithium and Yongsan Lithium rose more than 6%; Tianqi Lithium and Ganfeng Lithium, the two sector leaders, also gained ^[1].
• **[NEW] MMLC battery-grade (morning):** mid-price 151,600 yuan/ton, up 500 yuan/ton from the prior session, per Mysteel ^[2].
• **[ESCALATED] Supply-side constraint:** August maintenance concentrated at Sinomine Resources, Tianhua New Energy, and Jiuling Lithium is expected to cut 9,000-9,500 tons of lithium carbonate output in the month, with about 2,500 tons of additional impact carrying into September ^[1].
• **[NEW] Downstream pull:** copper foil industry logged a strong H1 reversal with tight supply, demand expansion, and product structure upgrades; some copper foil makers are already mulling another round of price hikes ^[3]. Hunan Yuneng's H1 net profit rose more than 8x, with the LFP industry launching a new round of price increases against high-end capacity tightness ^[4].

2. Copper: Bullish Forecast vs. Visible Stock Build

• **[NEW] UBS (single-bank view):** projects the copper market deficit widening from 219,000 tons in 2026 to 379,000 tons in 2027 ^[5].
• **[NEW] SHFE weekly stocks (counter-signal):** copper +19,817 tons, aluminum -18,300 tons, zinc +1,181 tons, lead -209 tons, nickel -771 tons, tin +56 tons, natural rubber -5,716 tons ^[6]. The +19,817-ton copper build sits against UBS's tightening structural call ^[5][6].
• The falsification test is the LME copper, aluminum, and nickel inventory prints due within ten minutes of 07:50 UTC, alongside the Eurozone August manufacturing PMI preliminary ^[7].

3. Exchange Rule and Access Changes

• **[NEW] SHFE hedging rules (effective last trading day of August 2026):** for silver, the exchange resumes automatic conversion of general-month hedging positions into near-delivery-month hedging positions under the lower of the two applicable limits ^[8]. For copper, the auto-converted near-delivery-month buy and sell hedging position is set to zero for non-FCM members, overseas special non-broker participants, and clients without near-delivery-month quotas - a sharper tightening than silver ^[8].
• **[NEW] QFI access expansion:** SHFE adds hot-rolled coil and stainless steel options; SHFE Energy adds low-sulfur fuel oil options ^[9].

4. Adjacent Data, Pending Prints, and Falsification Tests

• **[NEW] Pending:** Eurozone August manufacturing PMI preliminary and LME copper, aluminum, and nickel inventory changes due in roughly 10 minutes from 07:50 UTC ^[7].
• **[NEW] Indonesia (Dirjen Minerba, Director General for Minerals and Coal at the Ministry of Energy and Mineral Resources):** about a dozen nickel companies and dozens of coal companies have received 2026 RKAB revision approvals ^[9].
• **[NEW] Coking coal (Mysteel, 523-mine sample):** capacity utilization 68.2%, +0.7 percentage points week-on-week; daily raw coal output 1.532 million tons, +16,000 tons WoW; raw coal inventory 4.08 million tons, +17,000 tons WoW ^[9].
• **[NEW] Shanxi (Provincial Bureau of Statistics):** July raw coal output 68.933 million tons; January-July cumulative 680.287 million tons ^[9].
• **[NEW] Palm oil exports (Malaysia, Aug 1-20):** AmSpec reports 807,592 tons, -5.52% month-on-month; ITS reports 819,141 tons, -13.2% month-on-month ^[9]. Two trackers, different bases - quote both, not a point.
• **[NEW] Brazil (IBGE):** 2026 soybean production estimate 174.88 million tons ^[9].